Detailed Product Description Trombone Bb Key Alto Model: JYTB-152Initial: LongkouBell Material: Brass/Red brassSlide Material: BrassBore: 12.7mmBell: 204.4mmFinish: Gold lacquerCase: ABS/CanvasAccesories: Polishing Cloth, GlovesWe can produce and develop our instruments with the completed color and design according to the customers demandHS Code:9205100090